Car title

The parts car had a clean dash so I used it I found a vin on a wire tide to a bolt for the master cyl but it don’t match any of the numbers on rad support
The member i got it from said to use the numbers on the parts car and the title to tag and insure it but like I said I have put a ton of money in it and would be beyond pissed if I lost it over a bad idea like that and the jail time would suck too

It's against the law to use one car's VIN on another so I don't know what your solution is. Does it have a fender tag?